摘要
为了研究SC-MMC的阻抗特性及其主要影响因素,探究频率耦合效应对SC-MMC与电网构成的互联系统稳定性的影响,在考虑多次谐波交互耦合的SC-MMC谐波函数模型的基础上,采用多谐波线性化方法建立了SC-MMC交流侧小信号阻抗解析模型。通过仿真模型阻抗测量结果与解析模型对比验证了所建立模型的准确性,并通过案例分析验证了频率耦合效应在互联系统稳定中的重要影响,在研究互联系统稳定性时频率耦合效应应该被充分考虑。同时实验表明当互联系统发生振荡时,通过SC-MMC的控制器参数优化设计可以实现对互联系统谐振现象的抑制。
In order to study the impedance characteristics of SC-MMC and its main influencing factors,and to explore the influence of frequency coupling effect on the stability of the interconnection system composed of SC-MMC and power grid,the SC-MMC small signal impedance analysis model is established based on the SC-MMC harmonic function model.The accuracy of the established model is verified by comparing the impedance measurement results with the analytical model,and the important influence of frequency coupling effect in the stability of interconnected system is verified through case analysis,which should be fully considered when studying the stability of interconnected system.In the meantime,experiments show that the optimization of the SC-MMC can realize the restraint of harmonic phenomenon of interconnected system.
作者
徐杰雄
王灿
龚文明
朱喆
许树楷
XU Jiexiong;WANG Can;GONG Wenming;ZHU Zhe;XU Shukai(Department of Mechanical Engineering,Hatbin Institute of Technology,Shenzhen 518055,China;EPRI of China Southern Power Grid,Guangzhou 510080,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2022年第8期3166-3178,共13页
High Voltage Engineering
基金
直流输电国家重点实验室开放基金(SKLHVDC-2020-KF-05)。
关键词
SC-MMC
谐波函数模型
多谐波线性化
阻抗特性
稳定性
频率耦合效应
SC-MMC
harmonic function model
multi-harmonic linearization
impedance characteristics
stability
frequency coupling
